Lenco 02070 MIG-300/MIG-600 Ground Clamps with 3/0-4/0, 600 Amp Review Mutantra April 6, 2019 April 6, 2019 No Comments on Lenco 02070 MIG-300/MIG-600 Ground Clamps with 3/0-4/0, 600 Amp Review Designed especially for the mig welding process. Powerful Bite and swivel pad allow for low resistance ground connections. The 5/16 in copper coated steel t-handle makes it easy to apply maximum pressure.